基于反相微乳液法的尺寸可控性二氧化硅基于反相微乳液法的尺寸可控性二氧化硅纳米颗粒制备研究  

Study of the Preparation of Size-controlled Silica Nanoparticles Based on Reverse Microemulsion Method

作　　者：何晓晓 石碧华 王柯敏 陈冕 谭蔚泓 

机构地区：[1]湖南大学生物医学工程中心,湖南大学化学生物传感与计量学国家重点实验室,湖南大学化学化工学院,湖南大学生命科学与技术研究院,生物纳米与分子工程湖南省重点实验室,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2010年第4期62-66,共5页Journal of Hunan University:Natural Sciences

基　　金：新世纪优秀人才支持计划资助项目(NCET060697);国家自然科学基金资助项目(90606003,20775021);湖南省科技厅科技计划资助项目(2008kj3205)

摘　　要：通过考察水与表面活性剂的摩尔比(R),TEOS的量、氨水的量及包壳次数对基于Triton X 100/环已烷/正已醇/水反相微乳液体系制备二氧化硅纳米颗粒尺寸的影响,开展了基于反相微乳液法的尺寸可控性二氧化硅纳米颗粒制备研究.结果表明:在其他参数都恒定的情况下,通过改变微乳液体系中上述某一组分的量,可以在一定程度上实现二氧化硅纳米颗粒的尺寸可控性合成.首先,水与表面活性剂的摩尔比(R)对二氧化硅纳米颗粒的尺寸影响最大,随着R值的增大,颗粒的粒径逐渐减小,当R值达到18时,二氧化硅纳米颗粒的形貌变得不再是很规则的球形结构,并且分散性降低,团聚现象明显;其次是氨水的量,随着氨水量的增多,颗粒的粒径先减小,之后不再发生明显变化;另外随着包壳次数的增多,颗粒的粒径随之增大,并且颗粒之间的分散性也有所提高;但是TEOS的量对颗粒粒径的影响不明显.The preparation of size-controlled silica nanoparticles using base-catalyzed hydrolysis of tetraethyl orthosilicate （TEOS） in Triton X-100/cyclohexane/hexanol/water reverse microemulsion system was investigated. The effects of the water-to-surfactant molar ratio （R）, the amount of ammonium hydroxide, the amount of TEOS, and the shell coating times on the size of silica nanoparticles were investigated, respectively. The results showed that the size of the prepared silica nanoparticles could be well con- trolled by changing some parameters of the reaction system. The water-to-surfactant molar ratio （R） was the main factor of the parameters on the size of the silica particles. The size of the particles decreased obviously with the increase of R, but the silica nanoparticles were aggregated and irregular when the R was at 18. And with the increase of ammonium hydroxide, the size of silica particles first decreased and then was not changed. The size and dispersibility of the prepared silica nanoparticles also changed obviously with the increase of the shell coating times. However, the amount of TEOS almost had no effect on the size of the particles. These results have provided practical foundation for the preparation of size controlled silica nanoparticles.

关 键 词：反相微乳液 二氧化硅 纳米颗粒 尺寸可控 

分 类 号：O636.1[理学—高分子化学]